Thou shalt always investigate and understand who you are dealing with
Thou shalt always prepare for the negotiations
Thou shalt only negotiate with the final decision makers
Thou shalt never negotiate unless the other side is ready to consummate
Thou shalt always review all possible scenarios
Thou shalt only give in slowly and reluctantly
Thou shalt avoid giving major concessions
Thou shalt avoid major price reductions
Thou shalt never Be Belligerent, but Always Be Firm.
Thou shalt always ensure that an agreement is finalised before leaving the negotiating table